NumberResearch Membership · Data 2026-04

Recent prefix assignments

5 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 2026-04

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.

Most active assignees, last 30 days
T-MOBILE USA, INC. 5
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXAssigneeOCNRate centerState
2014-10-17 424-376 T-MOBILE USA, INC. 6529 TORRANCE CA
2014-10-17 442-264 T-MOBILE USA, INC. 6529 OCSD OCSD CA
2014-10-17 657-253 T-MOBILE USA, INC. 6529 FULLERTON CA
2014-10-17 657-363 T-MOBILE USA, INC. 6529 YORBALINDA CA
2014-10-16 541-930 T-MOBILE USA, INC. 6529 MEDFORD OR
2014-10-16 657-254 T-MOBILE USA, INC. 6529 ANAHEIM CA
2014-10-14 626-267 T-MOBILE USA, INC. 6529 ALHAMBRA CA
2014-10-14 661-445 T-MOBILE USA, INC. 6529 LANCASTER CA
2014-10-13 234-334 T-MOBILE USA, INC. 6529 AKRON OH
2014-10-13 331-307 T-MOBILE USA, INC. 6529 LOMBARD IL
2014-10-13 331-980 T-MOBILE USA, INC. 6529 AURORA IL
2014-10-13 440-650 T-MOBILE USA, INC. 6529 ASHTABULA OH
2014-10-13 682-260 T-MOBILE USA, INC. 6529 GRANBURY TX
2014-10-13 872-731 T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2014-10-13 970-825 T-MOBILE USA, INC. 6529 FT COLLINS CO
2014-10-09 206-488 T-MOBILE USA, INC. 6529 BAINBDG IS WA
2014-10-09 775-470 T-MOBILE USA, INC. 6529 RENO NV
2014-10-08 818-210 T-MOBILE USA, INC. 6529 NO HOLLYWD CA
2014-10-08 858-252 T-MOBILE USA, INC. 6529 DEL MAR CA
2014-10-03 510-944 T-MOBILE USA, INC. 6529 OKLD BKLY CA
2014-10-03 808-784 T-MOBILE USA, INC. 6529 HONOLULU HI
2014-10-02 213-326 T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2014-10-02 949-656 T-MOBILE USA, INC. 6529 IRVINE CA
2014-09-30 424-373 T-MOBILE USA, INC. 6529 CMTN CMTN CA
2014-09-30 562-341 T-MOBILE USA, INC. 6529 ALAMITOS CA
2014-09-30 650-772 T-MOBILE USA, INC. 6529 MT VIEW CA
2014-09-30 720-662 T-MOBILE USA, INC. 6529 DENVER CO
2014-09-30 720-757 T-MOBILE USA, INC. 6529 DENVER CO
2014-09-24 650-753 T-MOBILE USA, INC. 6529 SAN MATEO CA
2014-09-23 209-328 T-MOBILE USA, INC. 6529 MANTECA CA
2014-09-23 253-258 T-MOBILE USA, INC. 6529 AUBURN WA
2014-09-23 425-595 T-MOBILE USA, INC. 6529 EVERETT WA
2014-09-23 520-283 T-MOBILE USA, INC. 6529 TUCSON AZ
2014-09-23 657-252 T-MOBILE USA, INC. 6529 BUENA PARK CA
2014-09-23 707-862 T-MOBILE USA, INC. 6529 FRFLD-SUIS CA
2014-09-23 831-346 T-MOBILE USA, INC. 6529 SANTA CRUZ CA
2014-09-23 915-262 T-MOBILE USA, INC. 6529 EL PASO TX
2014-09-22 520-788 T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2014-09-22 669-241 T-MOBILE USA, INC. 6529 SUNNYVALE CA
2014-09-22 909-642 T-MOBILE USA, INC. 6529 FONTANA CA
2014-09-19 216-971 T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-09-19 216-972 T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-09-18 702-470 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2014-09-15 312-975 T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2014-09-15 424-364 T-MOBILE USA, INC. 6529 SAN PEDRO CA
2014-09-12 440-657 T-MOBILE USA, INC. 6529 ELYRIA OH
2014-09-11 234-716 T-MOBILE USA, INC. 6529 AKRON OH
2014-09-11 708-980 T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2014-09-10 214-713 T-MOBILE USA, INC. 6529 ENNIS TX
2014-09-08 206-468 T-MOBILE USA, INC. 6529 SEATTLE WA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 2026-04 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.